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3 Sheds-Sheet 1.

M. W. BALDWIN.

Locomotive.

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Locomotive.

' Patented Aug. 25. 1842.

AM.PHDTO-LITHO. C0. N.Y. (OSBOHNFS FRBCESS.)

38h t-Sh t3. M. w. BALDWIN. 688 6G Locomotive.

Patented Aug. 25, 1842.

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MATTHIAS W. BALDWIN, OF PHILADELPHIA, PENNSYLVANIA.

OF CONSTRUCTING LOCOMOTIVE STEAM-ENGINES BY WHICH THEY ADAPTrnniusnnynsro THElcURvEs AND unnunarrons or THE ROAD.

Specification of Letters Patent No. 2,759, dated August 25, 1842.

turning or running upon curved portions of a railroad and more perfectlyadapt themselves touany vertical inequalities of the rails than upon theplans heretofore adopted, while the wheels either of six- Wheeled oreight-wheeled engines may be all rendered driving-wheels; and I dohereby declare that the following is a full and exact descriptionthereof.

In the accompanylng drawing, Figure 1, is a side view of my locomotiveengine, and Fig. 2, a top view of a part of the frame work thereof, withthe angles, wheels and connecting rods, as applied to a six-wheelengine. Figs. 3, and 4, show detached parts thereof to be presentlydescribed.

In arranging and combining the four front wheels, and sometimes, also,the four back wheels, of my locomotive so as to admit of their havingthe required vibration in all directions, I attach a pivot, or pin, A,permanently, to the frame, on each side of my engine; but in such manneras that it may be raised, or depressed, by means of screw nuts, orotherwise. These pins, or pivots, extend vertically downward, and at B,they pass through a vibrating bar C, by which they are sustained, andwith which they are con nected by means of boxes formed in said bars,and in such a manner as to allow the bars to vibrate vertically. Thelower end of this pivot, or pin, has a curved face, and bears upon aspring S, in a manner that will be well understood by an examination ofthe drawing. The ends of these springs are received within pockets, orare otherwise connected with the boxes 6, b, in which the axles of thefront, or front and hind, wheels run. The boxes 6, b, are made so thatthey may swivel in the plumber blocks which receive them, being fittedthereto in the manner secured to me by Letters Patent of the UnitedStates, dated the 24th day of Au-' gust, in the year 1835.

In Fig. 4, the under side of one of the vibrating bars G, is representedwith the boxes 7), 6, shown as fitted into the plumber blocksby boringcylindrical recesses in the latter, and by making the ends of the formersegments of cylinders. It will be evident that the wheels and axleswill, under this arrangement, be left free to vibrate in such manner asto accommodate themselves to the curvesand undulations of the road,while the parallelism of the axles, and the :conse- By using foursprings instead of two, they may, if preferred, be placed over thejournals of the wheels.

The respective wheels I convert into driving wheels by means of couplingrods, and crank pins 011 said wheels, in a manner well known, and shownin Fig. 1, where M, is a steam cylinder; N, a piston rod; 0, a slide,and K, a connecting rod leading from said slide to the hind wheel of thelocomotive, from which the rods L, L, extend to the two fore wheels.

I intend sometimes, in combination with the foregoing, to arrange andcombine the cylinder, the piston rod, and the apparatus by which it isconnected with the driving wheels, and with the supply pump, in themanner represented in Fig. 5, of the accompanying drawings. I place thecylinder in the manner shown at I; that is, horizontally, or nearly so,and connect the piston rods J, to the upper ends F, of levers D, whichvibrateon their fulcrums at E, said fulcrums being firmly attached tothe boiler, or to the .quent regular action of the connecting rods iwill be undisturbed.

frame of the locomotive at their lower ends I the fulcrums E, of thelevers being the centers of curvature of the rods and pump chambers, andthe pumps being constructed, in other respects, like those ordinarilyemployed. In order to compensate, under this arrangement, for thevibrations of the piston rods in the cylinder, I intend in general toapply the vibrating stulfing box. for the construction of which Iobtained Letters Patent .01. the United States, dated on the seventeenthday of December 1840.

It will be obvious that under the arrangement herein described, the samegeneral plan of connecting and operating the respective parts, may beapplied to an eight-' wheeled, as well as to a six-wheeled locomotive;all that will be necessary in this case being the connecting of the fourback, or

hind, wheels with each other in the same 7 manner in which thefour'front wheels are shown in the accompanying drawing as connected;the pin, or pivot, A,the box, or

gudgeon, at B,the Vibrating bar C, being similar to those shown asconnected with the fore wheels; the whole eight wheels will in this waybe converted into driving wheels.

Having thus fully described the nature of my improvements in thelocomotive steam engine, and shown the manner in which the same arecarried into operation, what I claim as new, and desire to secure byLetters Patent, is, principally The manner in which I connect the fourtruck wheels with each other, so as to enable them to vibrate, and toadapt themselves to the curves and undulations of the road, by thecombined action of the pins, or pivots, A, the vibrating bars C, withthe box B, and the boxes and plumber blocks of the axles, with theircylindrical fittings, the whole be ing constructed, combined, andarranged substantially in the manner herein set forth,

the respective parts cooperating with each other, upon'the principle, orin the manner, above made known and described.

I do not intend to claim, nor do Iclaim, either of the parts abovedescribed, taken separately and individually.

Witnesses:

THOMAS BARTON ZANKEYs, JAMES GRAHAM.

-M. W. BALDl/VIN.

